If you want to see results, Chi said you have to be patient. It'll take about three months before you see any changes. But she added none of these products are going to work if you don't wear sunscreen every day.

For sunscreen, look for mineral ingredients, such as zinc and titanium oxide, because they are less irritating.

But there are some skincare ingredients Chi said are not as effective in over-the-counter form. Those include: peptides, collagen and hyaluronic acid.

Keep in mind, department store skin care may cost more but not necessarily because the ingredients are better.

"You're paying not just for the cream itself, but you're paying for the advertising of the cream," Chi said.